James I'm with Sureterm. Have a look at their website:
http://www.sureterm.com/4x4-insurance/ and give them a ring for a quote. I've found them to be the cheapest for my Paj, VX and Audi. Greenlaning and off-roading is covered and mods aren't a problem. When you ring, say you are a member of the Four Wheel Drive Club (which you are!) and you'll get an extra 15% off.
But.... having said that, it always pays to shop around, as what is good for me wont necessarily be good for you. So also try
Adrian Flux - Also offer members 15%
http://www.adrianflux.co.uk/cgi-bin/...ource=FouOWN01
or
Noel Dazely
http://www.noeldazely.co.uk/4x4.html
Please let us know how much each quotes you - be very interested to know.
@FM - yes as Crotch says, just run a cable from the adaptor box in the back.
Cheers
Nick